cancel
Cancels a transaction without card with the specified amount and RRN.
Return
Flow emitting a PurchaseResult which can be a PurchaseResult.Success containing SdkSuccessAnswer.Cancel with invoice and receipt details if successful, or a PurchaseResult.Error if the operation fails.
Additionally, the flow can emit intermediate states:
PurchaseResult.InitOperation: Indicates the terminal is being configured.
PurchaseResult.ReaderReady: Indicates the terminal is ready and waiting for the card.
PurchaseResult.Processing: Indicates the transaction is being processed.
Note: These intermediate states will only be emitted when the communication type is set to CommunicationType.AIDL.
Parameters
rrn
The Retrieval Reference Number (RRN) of the transaction to cancel.